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A Young's double slit experiment uses a ...

A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

A

(a) Straight line

B

(b) Parabola

C

(c) Hyperbola

D

(d) Circle

Text Solution

Verified by Experts

The correct Answer is:
C
The interference fringes for two slits are hyperbolic.
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In Young's doube slit experiment, what is the effect of following operations on interference fringes : (i) The screen is moved away from the plane of the slits. (ii) The monochromatic source is replaced by another monochromatic source of smaller wavelength. (iii) The monochromatic source is replaced by a source of white light. (iv) The width of the source slit is made wider (v) The separation between the two slits is increased. (vi) The distance between the source slit and the plane of the two slits is increased. (vii) The width of each of the two slits is of the order of wavelength of light source.

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Knowledge Check

  • In Young's double-slit experiment, the slit are 0.5 mm apart and the interference is observed on a screen at a distance of 100 cm from the slits, It is found that the ninth bright fringe is at a distance of 7.5 mm from the second dark fringe from the center of the fringe pattern. The wavelength of the light used is

    A
    `5000 Å`
    B
    `(5000)/(7) Å`
    C
    `2500 Å`
    D
    `(2500)/(7) Å`

  • In a Young's double slit experiment, the central point on the screen is

    A
    Bright
    B
    Dark
    C
    First bright and then dark
    D
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  • In Young's double slit experiment the two slits are d distance apart. Interference pattern is observed on a screen at a distance D from the slits. A dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light is

    A
    `(D^(2))/(2d)`
    B
    `(d^(2))/(2D)`
    C
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    D
    `(d^(2))/(D)`

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